btrfs: make subpage metadata write path call its own endio functions

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For subpage metadata, we're reusing two functions for subpage metadata
write:

- end_bio_extent_buffer_writepage()
- write_one_eb()

But the truth is, for subpage we just call
end_bio_subpage_eb_writepage() without using any bit in
end_bio_extent_buffer_writepage().

For write_one_eb(), it's pretty similar, but with a small part of code
reused.

There is really no need to pollute the existing code path if we're not
really using most of them.

So this patch will do the following change to separate the subpage
metadata write path from regular write path by:

- Use end_bio_subpage_eb_writepage() directly as endio in
  write_one_subpage_eb()
- Directly call write_one_subpage_eb() in submit_eb_subpage()

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

...

This commit is contained in:

Qu Wenruo 2021-04-27 12:53:35 +08:00 • committed by David Sterba

parent 390ed29b81

commit fa04c16574

1 changed files with 36 additions and 36 deletions

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fs/btrfs/extent_io.c

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